<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<table border="2">
  <caption>用户列表</caption>
  <tr>
    <th>用户名</th>
    <th>密码</th>
    <th>名称</th>
  </tr>
</table>
<script>
  let arr = [
          {username:"tom",password:"123456",nickname:"汤姆"},
          {username:"jerry",password:"abcdef",nickname:"杰瑞"},
          {username:"Lucy",password:"aabbcc",nickname:"路西"},];
  let table = document.querySelector("table")
  for (let u of arr) {
    let tr = document.createElement("tr");
    let usernameTd = document.createElement("td")
    let passwordTd = document.createElement("td")
    let nicknameTd = document.createElement("td")
    usernameTd.innerText = u.username;
    passwordTd.innerText = u.password;
    nicknameTd.innerText = u.nickname;
    tr.append(usernameTd,passwordTd,nicknameTd)
    table.append(tr);
  }
</script>
</body>
</html>